Observation of Tweek Characteristics in the Mid- Latitude D-Region Ionosphere

Ya’acob, Norsuzila and Yusop, Norbayah and Mohd Shariff, Khairul Khaizi and Yusof, Azita Laily and Ali, Mohd Tarmizi and Mohd Salleh, Mohd Khairul (2012) Observation of Tweek Characteristics in the Mid- Latitude D-Region Ionosphere. In: 2012 IEEE Symposium on Wireless Technology and Applications (ISWTA), 23-26 September 2012, Bandung, Indonesia.

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Abstract

Lightning generated signals (tweeks) recorded at a mid-latitude station, Gakona (62.71°N, 143.99°W) Alaska, in the North America region during January-April 2011 are used to study the tweek characteristic in D-region ionosphere in the waveguide formed by the earth’s surface and the lower ionosphere. Analysis of 873 tweeks shows that equinoxes seasons has highest tweek occurrence 99.54% and lowest for winter season 0.46%. The maximum harmonic (m) of tweek recorded is mode m=4 and tweeks with m=1 are more dominant occurrence 97.59%. Tweek can be utilized to monitor the night-time D-region ionosphere using the fundamental cut off frequency to measure the night-time variations of the lower ionosphere’s height of the D-region ionosphere along its propagation and the equivalent electron density at the reflection height. Equivalent electron densities for tweeks varies from 23-27 el/cm3 in the altitude ranged of 77 to 91 km during the local night.

Item Type:	Conference or Workshop Item (Paper)
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Faculty of Electronics and Computer Engineering > Department of Telecommunication Engineering
Depositing User:	Engr. Norbayah Yusop
Date Deposited:	05 May 2014 08:59
Last Modified:	28 May 2015 04:24
URI:	http://eprints.utem.edu.my/id/eprint/12340
Statistic Details:	View Download Statistic

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